Teat: round natural rubber teat 100% free of BPA, PVC and phthalates Made in Denmark. Complies with strict EN1400 regulations. The manufacturer recommends changing the pacifier every 6 weeks Does not include protective hood. We never recommend microwave sterilization. And in this case, as it is a PP pacifier and whose assembly is made with the same rubber as the teat, uncontrolled high temperatures can cause the pacifier to come apart. Our recommendation is to heat a pan with water, remove from the heat when it is boiling and place the pacifiers in for 2-5 minutes. MEASUREMENTS Height 4.9 cm x width 4.5 cm In this model, the ring glows at night